The Analysis On Intensity And Earthquake Resistance Of Drumscreen In Nuclear Power Station

With the rapid development of our country'economy, the electrical energy consumption is increasing quickly. In order to ease the pressure on electricity demand, the number of nuclear power station is increasing quickly, but the existence of nuclear radiation leads to the high reliability and security of the nuclear power equipment.Drumscreen is an important filter equipment in thermal power plants and nuclear power station. It can effectively remove vegetation, fish and other debris which is bigger than the mesh. It can also be used for urban environmental protection, water supply, metallurgy, chemical and other industries for the water drainage system. The drumscreen is working steadily, and the seal is realiable. The volume of water filtered by the drumscreen is large. The drumscreen has many advantages, so it has been widely used in our country.Drumscreen Being the important filtered water equipment of nuclear power station, we should guarantee the equipment to work regularly under different working conditions. Based on the finite element analysis software ANSYS, the article mainly involves about the finite element analysis to the drumscreen. In order to improve the accuracy and mesh easily, the drumscreen model is constructed in the ANSYS environment.Firstly, according to the different working conditios, it has carried on the statical analysis to the drumscreen. It gains the stress and deformation of the overall structure and the main axie structure. According to the distortion analysis of drumscreen, the biggest distortion of the gross structure and the axis structure don't interfere with the drumscreen' normal working. According to the stress analysis of drumscreen, the stress value on the peak of spoke strip is large, it should strengthen the rigidity here.Secondly, there are many bolt joints in the drumscreen. The article has mainly carried on the analysis to the joint of main spoke strip and wheel hub. It gains the stress value of the bolt joint place, and it also judges the security of the joint bolt.Thirdly, it has carried on the modal analysis to the drumscreen. The modal analysis is the beginning of the dynamical analysis.According tothe modal analysis of the drumscreen, it mainly gains the drumscreen'natural frequency and various mode of vibration to prepare for the spectrum analysis.In the end, it has carried on the spectrum analysis to the drumscreen. It mainly analyzes the response of the drumscreen to the earthquake under the static state and dynamic working conditions. Through inputting three different direction spectrum, it gains the displacement response and the stress response of the drumscreen structure under the different working conditions.